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Diff for /loncom/homework/default_homework.lcpm between versions 1.144 and 1.145

version 1.144, 2009/04/17 01:00:15 version 1.145, 2009/06/23 03:01:15
Line 434  sub caparesponse_check_list { Line 434  sub caparesponse_check_list {
 sub cas {  sub cas {
     my ($system,$input,$library)=@_;      my ($system,$input,$library)=@_;
     my $output;      my $output;
       my $dump;
     if ($system eq 'maxima') {      if ($system eq 'maxima') {
        $output=&maxima_eval($input,$library);         $output=&maxima_eval($input,$library);
     } elsif ($system eq 'R') {      } elsif ($system eq 'R') {
        $output=&r_eval($input,$library);         ($output,$dump)=&r_eval($input,$library,0);
     } else {      } else {
        $output='Error: unrecognized CAS';         $output='Error: unrecognized CAS';
     }      }
     return $output;      return $output;
 }  }
   
   sub cas_hashref {
       my ($system,$input,$library)=@_;
       if ($system eq 'maxima') {
          return 'Error: unsupported CAS';
       } elsif ($system eq 'R') {
          return &r_eval($input,$library,1);
       } else {
          return 'Error: unrecognized CAS';
       }
   }
   
   #
   # cas_hashref_entry takes a list of indices and gets the entry in a hash generated by Rreturn.
   # Call: cas_hashref_entry(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn.
   # Rentry will return the first scalar value it encounters (ignoring excess indices).
   # If an invalid key is given, it returns undef.
   #
   sub cas_hashref_entry {
       return &Rentry(@_);
   }
   
   #
   # cas_hashref_array takes a list of indices and gets a column array from a hash generated by Rreturn.
   # Call: cas_hashref_array(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn.
   # If an invalid key is given, it returns undef.
   #
   sub cas_hashref_array {
       return &Rarray(@_);
   }
   
 sub tex {  sub tex {
     if ( $external::target eq "tex" ) {      if ( $external::target eq "tex" ) {
  return $_[0];   return $_[0];
Removed from v.1.144  
changed lines
  Added in v.1.145

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